Yarn spool



Patented Aug. 11, 1925.

UNITED STATES PATENT ()FFIQE.

EDGAR F. HATHAWAY, OF WELLESLEY, MASSACHUSETTS, ASSIGNO'R TO SHAWMUT ENGINEERING. COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

YARN SPOOL.

Application filed August 2, 1924. Serial No. 729,728.

To all whom it may concern:

Be it known that I, EDGAR F. IIATHAWAY, a. citizen of the United States, and resident of Wellesley, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Yarn Spools, of which the following is a specification.

This invention relates to yarn spools and is particularly intended to provide a light, strong and durable spool construction adapted for carrying yarn in tube frames, as well as for other purposes. Such spools commonly require end heads or disks for the purpose of retaining, at eachend, built up layers of yarn wound on the barrel of the spool. Such spools have commonly been made with a solid wooden barrel with end heads comprising wooden disks glued or screwed to the end of the barrel.

The present invention, while: providing a tubular barrel of very light and strong con struction, provides also special attaching means which are entirely secure and reliable for detachably securing the end heads to the spool by a construction and arrangement which ensures the centralizing of the end heads and their positioning in a plane at right. angles to the axis of the barrel and at the same time maintaining a tight but releasable joint therewith.

In the accompanying drawings I have illustrated embodiments of the construction and arrangement characterizing this invention, in which:

Figure 1 is a vertical longitudinal section showing one end of the barrel with the end head secured thereto.

Figure 2 is a cross section through the barrel and the laminated plug which forms one of the attaching elements for retaining the head in position.

Figure 3 is an end elevation of such a spool.

Figure 4 is a longitudinal cross section showing a slightly modified form of construction.

Figure 5 is a cross sectional view through the barrel and attaching plug.

Figure 6 is an end View of the construction shown in Figure 4.

In the practice of this invention, according to the form illustrated in Figures 1 to 3, I provide a tubular barrel, preferably made of wood veneer, coated with suitable adhesive and coiled to form a laminated tube of several plies glued or cemented together.

Inside of each end of this barrel is inserted an attaching plug, in this instance consisting of a series of laminated rings or washers 2, placed side by side and preferably glued together and provided with a central bore in which is inserted an attaching stud or bolt 3 preferably formed with a portion of its shank polygonal or with projecting corners or the like, as shown at 3, to prevent turning with relation to the spool.

Such plugs may, of course, be glued in place in any event but which, in the present instance, I secure in position by a construc tion that utilizes the tendency of the laminated tube, when wet with the glue, to con tract somewhat in diameter when drying. The retaining plug, therefore, with its inserted stud, is pressed the proper distance into the open end of the tube while the tube is still damp with the adhesive used in cementing the plies of veneer together. As the tube contracts slightly in diameter, the plug becomes very slightly imbedded in the inside wall at its point of contact therewith since the plug resists the contraction at that point and, consequently, a slight annular shoulder adjoining the opposite end edges of the plug is formed by this contraction and thus serves to firmly anchor the attaching plug against longitudinal movement. The contraction of the tube upon the plug is strong enough to make the contact so tight that turning of the plug inside the barrel is prevented. The end disk or head of the spool is preferably formed of light pressed metal comp-rising a radial disk 4 with the central portion oifset and bent into the form of a hollow cup shaped lateral boss which is made of an external diameterto fit snugly inside the open end of the finished barrel, the center of the portion being perforated for the passage of the bolt or stud.

The journal member may be used to serve both as a. journal member and as a clamping nut for firmly clamping on holding the end head fast on the barrel. As different sizes and styles of journals are used, the outer end of the clamping member, which forms the journal, may be given a variety of shapes. In Figure 1 the clamping nut comprises a-n interiorly threaded nut 5, providedwith a reduced outward extension 5 of a size to lit the spool bearing bracket. Preferably the loose washer 6 is interposed be- 7 tween the inner end of the clamping journal member 5 and the inside face of the boss which it engages and which it preferably presses against the race of the attaching plug, although this latter contact is not strictly necessary, it being more important to secure a tight joint between the end of the barrel and the radial face of the head than to secure a tight contact between the inner face of the boss and the face of the attaching plug.

In the form shown in Figures 4 to 6, the attaching plug, instead of being made of disks placed side by side, is formed by spirally wound wood veneer 8, after the manner already described in forming the laminated veneer barrel. In that case a central bore is left of a proper diameter to receive the attaching stud or, if desired, the veneer may be coiled directly upon its attaching stud. This attaching member, inserted in the laminated tubular barrel 1, is retained in place in the manner already described above and the end head 4 wit-h its central boss l, is attached and secured in place by means of the journal nut 7 whose outer end is diametrically grooved to receive a projecting tongue of the next adjacent spool, thereby following the interlocking construction commonly used in these spools.

The above described constructions provide a spool of very light weight to which difi'ereni'; heads may be readily applied and yet be held with absolute security and precision in their proper position for service. The wood veneer terms an excellent surface for engaging and retaining the yarn against circumferential slip, and as any desired form of journal nut may be applied to fit different styles otjournal bearings old spools can be readily adapted to new styles of hearing brackets at a merely nominal cost, thereby avoiding the loss and waste involved in dis carding old spools when using new tube frames having different bearing brackets from the old ones.

What I- claim is:

1. A yarn-spool embracing in its construction a cylindrical shell of laminated veneer, an inserted laminated plug having a central bore, an. axial bolt secured in said bore, an end head provided with a lateral centrally located boss and a journal. nut having threaded engagement with said bolt to anchor the boss securely concentric with said tube, said nut forming at its center end a journal for rotatably supporting the spool in a bearing, substantially as described.

2. A yarn spool embracing in its construction a cylindrical shell 0t laminated wood, a wooden end plug upon which the spool is secured, an axially disposed bolt secured in said end plug, an end head provided with a central cup-shaped flange adapted to be inserted in the end of the tube, and a journal member adapted to be screwed on said bolt .to clamp the end head concentrically to the shell and having its outer end projecting beyond the end head to rotatably support the spool, substantially as described.

A yarn spool embracing in its construction a tubular barrel of spirally coiled veneer, an end plug imbedded in the interior taco of said barrel to prevent cndwise move ment, an axial stud projecting endwisc from said plug, an end head provided with a cup shaped central boss adapted to [it insidethe barrel, a clamping nut having threaded engagement with said stud to engage the boss and hold the head securely to the barrel, and an axial bearing journal projecting out wardly beyond the head, substantially as described.

4. A yarn spool embracing in its construction a tubular barrel formed of laminated veneer, a plug imbeddcd in the inner wall of said tube near its end to hold it against displacement, an end head provided with a concentrically disposed attaching member adapted to interiorly engage the barrel, and a journal member detachably anchored to said plug in position to clamp the end head against the end of the barrel and also provide a bearing journal for rotatably supporting the spool, substantially as described.

5. A yarn spool embracing in its construction a tubular barrel formed of laminated veneer, an interior wooden anchoring plug held against displacement by positive engagement with the inner wall of said barrel, an end head provided with a concentric lat eral boss adapted to lit inside the end of the barrel, a clamping member having detachable connection with said anchoring plug, and a journal projecting axially outward from the end head to form a rotative support for the spool, substantially as described.

In witness whereof, I have subscribed the above specification.

EDGAR F. HATHAlVAX. 

